Apparatus and method for generating in-phase signal and quadrature signal of multi-port network

Abstract

Provided is an apparatus and method for generating I/Q signals in a multi-port network, which can generate I/Q signals with accurate coordinates and sizes by repeatedly controlling the coordinates and size of an initial parameter in accordance with a predetermined reference condition. The I/Q signal generating apparatus of a multi-port network includes a multi-port network unit, a signal generation unit, and a control unit. The multi-port network unit converts a receive (RX) signal into a plurality of phase signals with different phases in accordance with a predetermined reference signal. The signal generation unit restores original data on the basis of the power of the phase signals received from the multi-port network unit. The control unit controls the restoration operation of the signal generation unit to be repeated so that the original data restored by the signal generation unit satisfies a predetermined reference range.

1 . An I/Q signal generating apparatus of a multi-port network, comprising:
 a multi-port network unit converting a receive (RX) signal into a plurality of phase signals with different phases in accordance with a predetermined reference signal;   a signal generation unit restoring original data on the basis of the power of the phase signals received from the multi-port network unit; and   a control unit controlling the restoration operation of the signal generation unit to be repeated so that the original data restored by the signal generation unit satisfies a predetermined reference range.   
     
     
         2 . The I/Q signal generating apparatus of  claim 1 , wherein the signal generation unit comprises:
 an initial parameter calculation unit calculating an initial I/Q generation parameter by using the phase shifts of the I/Q signals generated from the power of the phase signals received from the multi-port network unit;   a phase rotation unit calculating a corrected I/Q generation parameter by correcting the phase of the initial I/Q generation parameter received from the initial parameter calculation unit; and   a parameter normalization unit calculating a final I/Q generation parameter by normalizing the size of the corrected I/Q generation parameter received from the phase rotation unit.   
     
     
         3 . The I/Q signal generating apparatus of  claim 2 , wherein the control unit comprises:
 a first controller controlling the phase correction operation of the phase rotation unit to be repeated so that the sign of the phase of the previous corrected I/Q generation parameter and the sign of the phase of the current corrected I/Q generation parameter among the corrected I/Q generation parameters received from the phase rotation unit are opposite to each other; and   a second controller controlling the normalization operation of the parameter normalization unit to be repeated so that the I value and the Q value among the final I/Q generation parameters received from the parameter normalization unit have a predetermined level.   
     
     
         4 . The I/Q signal generating apparatus of  claim 3 , wherein under the control of the first controller, the phase rotation unit calculate the corrected I/Q generation parameter by using the initial I/Q generation parameter received from the initial parameter calculation unit to correct the phase of the initial I/Q generation parameter so that the major axis of the I/Q signals generated in the shape of an ellipse coincides with the X axis. 
     
     
         5 . The I/Q signal generating apparatus of  claim 1 , wherein the multi-port network unit comprises:
 a multi-port network dividing the RX signal into a plurality of signals, and adds the plural signals respectively to a plurality of carrier signals with different phases in accordance with a reference signal to output the phase signals with different phases; and   a power detection unit detecting the power of the phase signals received from the multi-port network.   
     
     
         6 . The I/Q signal generating apparatus of  claim 5 , wherein the multi-port network further comprises:
 a filter unit  113  filtering the power detection signals received from the power detection unit to block noises other than the power detection signals.   
     
     
         7 . An I/Q signal generating method for restoring original data on the basis of the power of a plurality of phase signals with difference phases received from a multi-port network, comprising:
 calculating an initial I/Q generation parameter by using the phase shift of I/Q signals generated from the power of the phase signals;   correcting the phase of the initial I/Q generation parameter to calculate a corrected I/Q generation parameter, and repeating the phase correction operation so that the sign of the phase of the previous corrected I/Q generation parameter and the signal of the phase of the current corrected I/Q generation parameter, among the corrected I/Q generation parameters, are opposite to each other; and   normalizing the size of the corrected I/Q generation parameter to calculate a final I/Q generation parameter, and repeating the normalization operation so that the I value and the Q value among the final I/Q generation parameters have a predetermined level.   
     
     
         8 . The I/Q signal generating method of  claim 7 , wherein the repeating of the phase correction operation calculates the corrected I/Q generation parameter by using the initial I/Q generation parameter to correct the phase of the initial I/Q generation parameter so that the major axis of the I/Q signals generated in the shape of an ellipse coincides with the X axis. 
     
     
         9 . The I/Q signal generating method of  claim 8 , wherein the phase correction operation and the normalization operation are repeated a predetermined number of times.